本文介绍了mysql，遍历列名的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想从 MySQL 表中获取所有列名，遍历每个列名，然后使用这些列名作为变量运行存储过程.效果如下:
I would like to get all of the column names from a MySQL table, loop through each column name and then run a stored procedure using those column names as a variable. Something to the effect of:
colnames = get column names from table
for each colname
if something changed then
do something
else
do something else
看起来 SHOW COLUMNS FROM myTable 会给我列名，但我如何将列名放入循环中?
It looks like SHOW COLUMNS FROM myTable will give me the column names, but how would I get the column names into a loop?
我真的很想使用本机 SQL 在存储过程中运行所有这些.由于我仍在学习 MySQL 的复杂性，这对我的项目很有帮助.感谢您的帮助.
I would really like to run all of this in a stored procedure using native SQL. Since I'm still learning the intricacies of MySQL, and this would really help out my project. Thanks for your help.
推荐答案
我想你想要这样的:
DECLARE col_names CURSOR FOR
SELECT column_name
FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = 'tbl_name'
ORDER BY ordinal_position;
select FOUND_ROWS() into num_rows;
SET i = 1;
the_loop: LOOP
IF i > num_rows THEN
CLOSE col_names;
LEAVE the_loop;
END IF;
FETCH col_names
INTO col_name;
//do whatever else you need to do with the col name
SET i = i + 1;
END LOOP the_loop;
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